Electric switch



L. A. HANSON.

ELECTRIC SWITCH. APPLICATION FILYED OCT. 7, 1920.

Patented Mar. 7, 1922.

gwuenw'a M UNITED STATES PATENT OFFIQE.

ELEQTRIC SWITCH.

Application filed October 7, 1920.

To all whom it may concern:

Be it known that LARRY A. Hanson, a citizen of the United States,residing at Altoona, in the county of Blair and State of Pennsylvania,has invented certain new and useful Improvements in Electric Switches,of which the following is a specifioation.

This invention relates to electric switches which are adapted to rotateand establish contact with different radially spacial terminal points,and the primary object of this invention is to provide an electricswitch which has no moving parts back of the panel board, and issusceptible of being readily attached and detached from the front of thepanel board. v

A further object of the invention is to provide means for readilyremoving the switch arm for the purpose of inspection and 'enewalwithout disturbing the fasten ing means back of the panel board.

A still further object of the invention is to provide adjustable stopsfor the switch arm, as an integral part of the switch mechanism.

With these and many other objects in view which will be more readilyapparent as the nature of the invention is better understood the sameconsists in the novel construction, combination and arrangement of partsas will be more fully pointed out illus- V trated and claimed.

It will of course be understood. by those skilled in the art to whichthis invention belongs that the same is susceptible to various changesin construction without departing from the spirit or scope of theinvention, but a preferred and practical embodiment of the invention isshown in the accompanying drawings in which;

' Fig. 2, is a plan view of the parts shown in Figure 1.

Fig. 3, shows a plan and sectional view of the cap used to hold theswitch in position on the face plate or panel board.

Fig. 4:, shows a cup shaped base which is adapted to be positioned onthe panel board and to coact with the parts shown in Figure 3 of thedrawings.

Fig. 5, shows a plan and sectional view of the switch blade support,which is held Specification of Letters Patent.

in position by the cap shown in Figure 3 of the drawings.

Fig. 6, shows a plan and side view of the switch blade usedin connectionwith the improved switch.

Fig. 7, shows an elevational view and an edge view of the locking ringused to hold the cap in position. i

Fig. 8, shows aresilient disk which forms a flexible bearing for therotatable part of the switch, the flexible bearing forming a electricalcontact surface between the stationary part of the switch and therotatable part as shown in Figure 5 of the drawings.

Fig. 9, shows one element of switch stop mechanism which'is shown inposition in Figure 1 of the drawings.

Fig. 10, shows the stationary element of the switch stop mechanism whichis shown in operative position in Figure 1 of the drawings.

In carrying out this invention no change is contemplated in the panelboard to Which the switch is attached and to this end I have provided aswitch that-is readily applicable to existing panel boards and consistsessentially of a cup shape base element designated by the numeral 10,having threads cut on the out side surface 11, and provided with a basehaving the central portion 12 pressed upward, such as to form a flatcircular bearing face 13 for a resilient disk 14:. which is adapted tobe positioned within the cup 10 and be engaged by the periphcrialsurface 15 oi an inverted cup shape housing 1b having an outward flaringbase constructed in such manner that the body 17 of the housing has asmaller diameter than the base portion 18 the two diameters forming anoffset 19 in the body '17 against which the peripheral surface 20 of acap 21 is adapted to rest as shown in Figure 1 oi the drawings.

The cap 21 further provided with a flaring base which is slightly largerin diameter than the body portion. The flaring base forms a shield orcover for a locking ring 23 which is shown in position in Fig- .screw 28provided with a plurality of perforations 26 and 27. The perforation 26is designed to receive a knob holding screw 28, as shown in Figure l ofthe drawings, which is adapted to hold the switch arm 29 in position onthe face 25 of the cupped housing 16. The passing through the opening 28into the knob.

For the purpose of preventing the switch arm 29 from rotatingindependent of the housing 16, there is provided a perforation 28through which an upturned portion 35 of a switch stop 36 is adapted topass, thus locking the arm in relation to the housing 16. The stop 36 isfurther provided with a downward projecting wing 37 which is adapted toenter into striking engagement with a stationary limit post 38, or 39when the switch arm 29 is rotated such that the post 32 engages theterminals as the switch arm is moved from one side to the other.

For the purpose of providing a common central terminal for all theterminals set in the semicircle as shown in Figure 2, I prefer to use athreaded bolt 41, which is adapted to pass through the panel board 412and to hold not only a terminal wire 43 but to form a, position holdingdevice for the switch stops 38 and 39 in addition to holding the cup 10in position on the panel board, as well as the disk 14 within the cup 16in its operative position as shown in, Figure 1 of thedrawings.

From the foregoing it will be readily apparent that the above describedswitch can readily be taken apart for examination by first unscrewingthe cap 21, which holds all the operative elements of the switchtogether. Having unscrewed the locking collar 21 from the base 10 theswitch arm 29 can be readily cleaned or the switch mechanism can then bereadil examined. I

Having thus described my invention what I desire to claim and secure byLetters Patent is 1. In an electric switch, in combination with a panelboard, a cup shape base hav ing a struck up centre adapted to be securedto the panel board, a resilient disk positioned. withinthe cup shapebase and adapted to coact with the struck up central portion of the cup,an inverted cup adapted to engage the said disk and means for drawingthe inverted cup in position on the disk.

2. In combinationwith a panel board, an electric switch adapted to berotatively secured to the panel board, a stationary cup shaped basehaving a struck up centre, a resilient disk, an inverted cup having awidened mouth which is adapted to impinge on the disk and makeelectrical contact therewith, a switeh stop positioned on the stationarybase and a pendent element, positioned on the rotatable part of theswitch,

adapted to engage the stationary stop and thus limit the swing of theswitch.

3. In combination with an electric switch, a panel board to which theswitch is adapted to be attached, a stationary base attached to thepanel board, a rotatable inverted widened mouth cup, means for securingthe rotatable cup to the base and resilient means for locking therotatable cup to the stationary base, an interior threaded inverted cuphaving an opening in the base therein through which the rotatable cup isadapted to pass, a locking ring, a switch blade, a knob, the bladeadaptedtobe sandwiched between the base of the rotatable cup and theknob.

4. A mounting for electrical switch arms including in combination with asupport for the electrical contacts, of a base member secured to oneface of the support, a handle element carrying a switch arm, and meansengaging with the handle element and also with the base member forrotatably and detachably connecting the handle carrying the switch armto the support.

5. A mounting for electrical switch arms including in combination withthe panel board and contacts carried thereby, of a member locked to oneface of the panel board, a handle carrying the switch arm, means fortensioning the handle, and means engaging with the handle and alsowit'hthe member secured to the panel for detachably holding said handle inposition and also causingthe handle to engagethe tensioning means withmore or less force.

6. A mounting for electrical switch arms including in combination withthe panel board and contacts carried thereby, of a rel-' ativel cupshaped member secured to one face of the panel board, a handle carryingthe switch arm, a cap-like member carried by the handle and having anannular abutment shoulder, and a ring like member adapted to engage withsaid shoulder and the upstanding portions of thesaid cup shaped memberto thereby rotatably mount the handle in such a manner thatitisdetachable from the exposed face of the panel board. r

7. In a rotary electric switch in combination with a panel board astationary base having adjustable stop elements enga ing stop elementson the rotatable part '0 y the switch thus limiting the relativemovement a of the rotatable tionary base.

In testimony whereof I have aifixed,,my signature in the presence of twowitnesses.

LARRY A. HANSON.

part of the switch. stalVitnesses N. E. GEE, ,ADAMLnaKn.

' "has

